Morphological description of spontaneous pelvic fin loss in a neotropical cichlid fish
Nicolás Roberto Ehemann,
Axel Meyer,
Christopher Darrin Hulsey
Abstract:Pelvic fins are a characteristic structure of the vertebrate Bauplan. Yet, pelvic fin loss has occurred repeatedly across a wide diversity of other lineages of tetrapods and at least 48 times in teleost fishes. This pelvic finless condition is often associated with other morphological features such as body elongation, loss of additional structures, and bilateral asymmetry. However, despite the remarkable diversity in the several thousand cichlid fish species, none of them are characterized by the complete abse… Show more
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